相关实验视频
Updated: Jul 26, 2025

10:28
A Cell Culture Model for Producing High Titer Hepatitis E Virus Stocks
Published on: June 26, 2020
9.8K
在慢性感染E型肝炎患者的索福斯布维尔治疗期间出现与耐药性相关的变异
André Gömer1, Mara Klöhn1, Michelle Jagst1,2
1Department of Molecular and Medical Virology, Ruhr University Bochum, Bochum, Germany.
Hepatology (Baltimore, Md.)
|June 19, 2023
概括
索福斯布维尔治疗慢性乙型肝炎病毒 (HEV) 感染的免疫功能低下的患者,这些患者选择了耐药变体. 病毒种群的多样性推动了耐药性的出现,特别是A1343V替代,阻碍了持续的病毒学反应.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 抗病毒药物开发 抗病毒药物开发
背景情况:
- 慢性肝炎E病毒 (HEV) 感染对免疫功能低下的个体构成重大挑战,原因是缺乏已批准的抗病毒疗法.
- 一项II期试点试验评估了核酸类比索福斯布维尔用于治疗慢性HEV感染.
研究的目的:
- 在HEV感染患者的索福斯布维尔治疗期间,特征化静脉内病毒群变化.
- 识别与治疗相关的变异,并了解它们在治疗反应中的作用.
主要方法:
- 依赖RNA的RNA聚合酶 (RdRp) 序列的高通量测序,以分析病毒群体动态.
- 使用基于HEV的记者复制系统来评估新兴变异的索福斯布维尔敏感性.
主要成果:
- 索福斯布维尔最初降低了HEVRNA水平,但在大多数患者中没有达到持续的病毒学反应.
- 观察到高HEV群体异质性,表明适应治疗压力的适应性.
- 新兴变种对索福斯布维尔的敏感性降低,EC50值高达野生类型的12倍.
- 一种特定的替代物,ORF1中的A1343V,在9名患者中的8名患者中显著降低了索福斯布维尔的敏感性.
结论:
- 病毒群体动态对于慢性HEV的抗病毒治疗结果至关重要.
- 治疗诱导的对索福斯布维尔耐药变异的选择,特别是A1343V,有助于治疗失败.
- 这项研究揭示了HEV感染中对sofosbuvir产生抗药性的新机制.
相关概念视频
Subviral Agents
48
Subviral agents are infectious entities that resemble viruses but lack one or more viral components, such as a capsid or essential replication machinery. These agents include viroids, prions, and satellites, each possessing distinct structural and functional characteristics that influence their mode of infection and replication.Viroids are the simplest subviral agents, consisting of circular, single-stranded RNA molecules without a protein coat. They exclusively infect plants, relying entirely...
48
Viral Mutations
32.6K
A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...
32.6K
Retrovirus Life Cycles
46.3K
Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the...
46.3K
Hepatic Drug Excretion: Influencing Factors
165
The biliary system of the liver, crucial for bile secretion and drug excretion, comprises intrahepatic bile ducts that merge to form the common hepatic duct. This duct, carrying hepatic bile, combines with the cystic duct, draining the gallbladder and forming the common bile duct, which empties into the duodenum. Bile, produced by hepatic cells lining the bile canaliculi, is composed primarily of water, bile salts, pigments, electrolytes, and lesser amounts of cholesterol and fatty acids. Bile...
165

